BIO 1500 - EXAM #1 QUESTIONS AND
ANSWERS
what happened later in earth's history? - ANSWER-the maximum insect size was
constrained by predators & didn't follow changes in O2 levels
order of ancient dragonflies? - ANSWER-Odonata
genus of the extinct dragonfly during the Carboniferous Period - ANSWER-
Meganeura
what are some characteristics of the Meganeura? - ANSWER--human friendly
-colorful wings for mating (males)
-all around vision
-predators
-3 ft wingspan
-aquatic larvae
when was the first Meganeura fossil found? - ANSWER-325 million years ago
how were Meganeura aquatic predators? - ANSWER--lie eggs in water for 3 years
-larvae give off fearsome vibes
-can catch bigger prey
the passive movement of molecules - ANSWER-diffusion
what type of thermal movements is diffusion driven by? - ANSWER-Brownian
characteristics of individual molecules? - ANSWER--random, unpredictable motion
-not directed to low concentration
-never stops
characteristics of the net movement of all molecules? - ANSWER--is predictable
-directed from high to low concentration
-stops when it reaches equilibrium
how does the diffusion time change with the distance travelled? - ANSWER-diffusion
time increases with the square of the distance
[EXAMPLE] 2x distance equals.... - ANSWER-4 fold time
[EXAMPLE] 10x distance equals.... - ANSWER-100 fold time
diffusion works great within what types of cells? except for which cells? - ANSWER--
within cells that lengthen between 1-100 micrometers
-doesn't work good within axons
the capacity to do work or cause motion - ANSWER-energy
ANSWERS
what happened later in earth's history? - ANSWER-the maximum insect size was
constrained by predators & didn't follow changes in O2 levels
order of ancient dragonflies? - ANSWER-Odonata
genus of the extinct dragonfly during the Carboniferous Period - ANSWER-
Meganeura
what are some characteristics of the Meganeura? - ANSWER--human friendly
-colorful wings for mating (males)
-all around vision
-predators
-3 ft wingspan
-aquatic larvae
when was the first Meganeura fossil found? - ANSWER-325 million years ago
how were Meganeura aquatic predators? - ANSWER--lie eggs in water for 3 years
-larvae give off fearsome vibes
-can catch bigger prey
the passive movement of molecules - ANSWER-diffusion
what type of thermal movements is diffusion driven by? - ANSWER-Brownian
characteristics of individual molecules? - ANSWER--random, unpredictable motion
-not directed to low concentration
-never stops
characteristics of the net movement of all molecules? - ANSWER--is predictable
-directed from high to low concentration
-stops when it reaches equilibrium
how does the diffusion time change with the distance travelled? - ANSWER-diffusion
time increases with the square of the distance
[EXAMPLE] 2x distance equals.... - ANSWER-4 fold time
[EXAMPLE] 10x distance equals.... - ANSWER-100 fold time
diffusion works great within what types of cells? except for which cells? - ANSWER--
within cells that lengthen between 1-100 micrometers
-doesn't work good within axons
the capacity to do work or cause motion - ANSWER-energy
